Bed-motion for printing-presses.



M. A. DROITGOUR.

BED MOTIONPOR PRINTING PRESSES.

APPLIUATTON FILED MAR. 14, I911.

ML A DRUITGOURQ BED MOTION-'56}; PRINTING PRBSSES.'

APPLICATION FILED MAR. 14, 1911.

'- Patented July 9, 912.

4 SHEETS-SHEET 2.

M. A. DROITGOUR. BED MOTION FOR PRINTING PBES SES. APPLICATION FILEDMAR. 14, 1911.

L32,12& Patented Ju1y 9, 1912.

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M. A. DROITOOUR. BED MOTION FOR PRINTING PRESSES.

APPLICATION H'LB'D MAR. 14,1911.-

' Patented July 9, 1912.

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- WMTED g1 ims PATENT @FFME.

MICHAEL ANDREW DROITCOUR, OF- OAK PARK, ILLINOIS, ASSIGNOR T0 IVIIEHLEPRINTING PRESS-AND MANUFACTURING COMIPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILQINOIS.

, BED-Morton FOR PRINTING-PRESSES.

Specification of Letters Patent.

r sented J i e, iota;

Application filed March 14, 1911. Serial Nb. 614,498.

To all whom it may concern: 1

Be it known that I, MICHAEL A. DRo1'r-.

coon, of Oak Park, in the county of Cook and Stateof Illinois, haveinvented cert. in new and useful Improvements in Bed-Motions forPrintingPresses; and I hereby declare thatthe following is a full,clear, and

exact description thereof, reference being,

had to the accompanying drawings, which form. part of thisspecification.

This invention is an improvement in means for converting rotary intoreciprocating motion, andis particularly adapted for reciprocating thetype beds of bed and cylinder printing presses. y

The particular object of the invention is to provide novel means fordriving the bed at a uniform speed of movement during part of eachstroke, and for reversing the motion of the bed at the end of eachstroke, by novel means by which the bed will be slowed down, stopped andstarted back with accelerating speed until it-is again moving at thefull speed of the uniform driving means; the uniform driving means andthe without shock or jar.

In this invention the bed is directlydriven and reversed by means of asingle bed-driving gear engaging a rack on.the bed; novel means beingprovided for driving the gear in either direction at uniform speed; andfor slowing down, stopping and reversing the motion of such gear, so asto similarly affect the bed.

The presentinvention therefore comprises novel means for driving the beddriving gear alternately in opposite directions at full speed; novelmeans whereby such gear is slowed down, stopped and its motion reversedindependently of the means for driving said gear at uniform speed; themeans for slowing down and reversing the rotation of the bed drivinggear has control of such gear while the mechanism for uniformlyrotating, said gearhas lost control thereof; and the proper mechanismfor uniformly rotating the gear has control of the hed-driving-gear whenthe reversing mechanism has lost controltheredf; the parts the properactuating mechanism,

The invention is adaptable for use in suitable driver.

many machines where 'it-is'de sired to convert rotary into reciprocatingmotion. 1 will describe it in detail as used for reciprocating the bedsof printing presses, and it can be readily adapted-to other machines bythose skilled in'the art.

In the accompanying drawingsFigure 1 is a conventional side elevation ofparts of a printing press provided withmy invention. Fig. 2 is an endview of Fig. 1. Fig. 3 is a plan view of the movement; partly insection. Fig.4 is a detail view showingthe pinions shifted outward tobring pinion 8 into positionto engage gear 2. Fig. 5 is'a;

diagrammatic view indicating the reversal view indicating the reversalof the bed at the right hand end of its stroke.

The machine to which the invention is ap plied may be of any desiredusual construction and a printing press is simply conventionallyillustrated in the drawings.

On the shaft ofthe cylinder C is a gear 1 which" meshes .with a gear2,mou nted loosely upon a countershaft 6. Gear 2 isdriven by means ofa'pinion 3 mounted upon a shaft 3 to.which power may be applied by beltpulleys or gearing (notshown) from any Gear 3 also .meshes with a gear 4keyed on a crank shaft 5, hereinafter referred to;

A short shaft 9 is mounted in one of the adjacent side frames F and abracket F attached thereto, .(Figs. 1 and 2) and on this shaft 9 areslidably mounted three pinions 8, 7 and 11, Pinion 8 maybe shiftedfacewise on "shaft 9 by any suitable means. As shown the hub of gear 8has an annular groove 8 which is engaged by an arm 8 on a bar 8 which isslidablysupported in the side f'rameF and bracket F, and is shifted atthe proper-time, as hereinafter explained.

The pinion 8 is continually in mesh with ,gear2.

' The pinion 7 is rigidly connected with pinion 11 but spacedaparttherefrom. Pin; ion 11 continually meshes with a gear 10 keyed onshaft-3. The pinions 7 and 11 might be formed integral and revolve asone piece. The pinions 7 and 11 rotate independently of pinion 8 but maybe caused to iiiove facewise onthe shaft 9 by means of a finger 8 on bar8 engaging an annular groove 11 in the hub of pinion 11.

, When shaft3 is driven in the proper .di- 'rection pinion, 8 willconstantly revolve clockwise; while pinions 7and 11 will revolve'counter-clockwlse. In other words gear 2 is. driven by gear 3 on shaft 3con stantlyfcounter-clockwise, and in turn drives inion 8 constantlyclockwise; while gear 10 on shaft 3% drives the pinion 11 (and 7)constantly counter-clockwise when the machine ,i's 'in operation.

gear 2 is keyed on shaft 6 beside gear 5 flf Geai 2 is alternatelydriven by pinions 7 and 8; which latter are shifted alternately intomeshwith 'gear 2, as hereinafter de-? scribed and consequently aspinions 7 and 8 rotate in opposite directions the gear 2 will bealternately drivenin opposite directions. The gear2f will thus turnshaft 6 alternately in opposite directions, and drive the bedalternately in opposite directions.

On shaft'6 iskeyed a gear'12 which'meshes with a rack 13 on theunderside of the bed B and consequently when pinion 8 is driving gear2", the bed will be moved in one direc tion; and when pinion 7isdrivinggear-Q -.the bed"w ill;.be moved in the opposite direc- 3.tioir f The" gear 2isa' segmental gear, its teeth being removed or cutaway for about 120,

or one-third theicircumference of the gear as shown'at 2 Pinion 8 is ofsuch width that-when the pinions 8, 7 ,.11 are shifted outward- (to thepositionv shown in Fig. 4) --pinion 7 is out of position tomesh withgear 2'fand pinion Sis in position-to mesh with both gears 2 and 2; andconsequently will transmit motion from gear 2 to gear 2' and cause gear2'-to rotatevwith, and in the same direction as, gear 2. When thepinions 7, 8,11 are shifted inward to the position indicated in Fig. 3'pinion 8 is moved out of position to mesh with gear 2, and pinion 7 isbrought into position to mesh therewith, and consequentlywillj drivegear 2 in a direction opposite to't'he rotation of gear 2.

, Pinion S'prefe'rably drives'gear 2 while the bed is making itsimpression .stroke; and

. pinion 7 drives gear 2' while the bed is making its return stroke.

, While the b dis being driven from and by the rotation" of gear 2', asdescribed, it is moved at substantially uniform speed; but gear 2 losescontrol of thejbed when the teeth of pinion 7, or 8, enter the gap 2 ofgear 2' and while gap 2 is opposite pinions 7 and 8 the latter-areshifted laterally on shaft 9; and at such times the bed is under thecontrol of. the vreversing mechanism whichjslows down, stops and startsthe bed in opposite directions and accelerates its speed untilgear 2 andpinions 7 and '8 are tur i g at the same peripheral speed, and

when gear 2 again comes into mesh with pinion 8, 01-7, it will beturning in the proper direction and at the pe'ripheral speed of saidpinion, so that the proper pinion 8,

or 7, will come into mesh with gear 2 with- The pinions 7 and 8 may. beshifted at theproper times during the reout clash.

pinions 7 and 8; the movement ofthe bed is reversed by the followingmeans:

r The reversing mechanism.A toothed segment 16 may be fast to gear 12,or to the shaft 6 beside gear 12. This segment-is about 120 in extent,and during the reversal periods isadapted to engage with a rack 15 on asliding bar 15?, which is guided in suitable supports in the mainframe,and has a Scotch yoke head 15 on oneend provided with a vertical slot 15which is engaged by a crank pin or roller 14 ona crank 14 attached tothe shaft 5; which is driven by gear 4: from gear 3 as above described.The

parts are so arranged that the segment 16 I and rack 15' will havecontrol of the gear 12 while the gear 2' is out of mesh withboth pinions7Jand 8; and the segment 16 and rack 15 surrender control of the bedwhen pinion 7, or 8,'comes into mesh with gear 2'. In the example shownin the drawings the parts are so proportioned that the bed driving gear12. will be driven about twoa thirds of a revolution in one directionwhile gear 2' is in mesh with pinion 7; then as pinion 7 enters gap 2*in ear 2 segment 16' v comes into mesh with rac; 15'; and the bed I 9 isreversed by the segment and rack. Dur

ing this periodof reversal pinions 7'and 8 .1

are shifted facewise on shaft 9, so as to bring pinion 8 into positionto mesh with gear 2, and when the segment and rack lose control of thebed, gear 2 and pinion 8 continue to drive the bed on its printingstroke until pinion 8 again runs into gap 2 of gear 2; at which momentsegment 16 and rack15 again take control of the bed, and reverse themotion of the bed while the pinions 7,

and 8 are being shifted so as to bring pinion 7 into position to meshwith gear 2' at the end of such reversal period.

In the example shown, the rack bar caused to make three completereciproca tions for each reciprocation of thebed. In otherwords shaft 5is geared to rotate three times to every two revolutions of the shaft.6.

In the example shown in the drawings, the parts are so proportioned thatthe bed.

. '80 2 beside and fast to the gear 2. During the r timethat the gap 2in gear 2 is passing the said saga-a pair of oppositely rotating drivenpinions'at one. side of said shaft, and means whereby said pinions maybe alternately caused to mesh with .the gear keyed.-

to said shaft; with asegri ien't on'the shaft anda reciprocating rackbar adapted to re-' verse the rotation of the shaft while both pinionsare disengaged therefrom.

I 2.- In combinat1on, a reciprooatingbed, a rack attached thereto, a-bed driving gear, a shaft carrying said gear, a gear keyed on saidshaft, a driven gear loose on said shaft,

1 beside the latter gear; aisecond driven gear and oppositely rotatingpinions adapted to transmit motion from the respective driven gears tothe gear keyed on the shaft; with means for shifting said pinions so asto alternatelyengage them with the said keyed shaftcarrying said gear, agear keyed on.

gear; 3; In combination, a reciprocatlng bed, a \rack attached thereto,a bed driving gear, a

" said shaft, ,a driven gear loose on said shaft l ed to transmit motionfrom thedriven gears beside the latter gear; asecond driven gear, a pairofopp'ositely rotating pinions adapt'.

to the gear keyed on the shaft; and means for shifting said pinionsalternately into mesh with the said keyed gear; with means for reversingthe rotation of the shaft while the pinions are not in control thereof.

-4.. In combination, a shaft, a gear keyed to-said shaft, a pair ofoppositely rotating pinions at one side of said shaft adapted to bealternately engaged with the gear keyed on said shaft, said gear beingprovided with a gap to permit lateral shifting of the pinions, andmean's'for shifting the pinions while the gap *is adjacent them.

5. In combination, a shaft, a gear keyed to said shaft; a pair ofoppositely rotating pinions at one side ofsaid shaft adapted to, bealternately engaged with 'the gear keyed'on said shaft, said gear beingprovided with a gap. to permit lateral shifting of the'pinions; withmeansffor reversing the j rotation of the shaft while both pinions aredisengaged-from said gear, and means for shift-ingthepinions while thegap is adjaa rack driving gear, a shaft carrying said gear, a gappedgear keyed on said shaft, and

a pair of oppositely rotating pinions at one side of said shaft'respectively adapted to transmit motion tothe said. gapped gear; withmeans'for reversing the motion of the shaft while the pinions are out ofmesh with the segmental gear, and means for shifting said pinions whenthe gap is adjacent them.

8. In combination, a reciprocating rack, a rack driving gear, a shaftcarrying said gear, a segmental gear keyed on said shaft,

and a-pair of oppositely rotating pinions respectively adapted totransmit motion to. 'the'said segmental gear; with means for reversingthe motion of the shaft comprising a segment on the shaft,"and a crankactuated rack bar adapted to be engaged by the seg- -ment while thepinions are out of mesh with the segmental gear.

9. In )mbination, a reciprocating rack, a rack driving gear, a shaftcarrying said a loose driven gear on said shaft besidethe gear,asegmental gear keyed on said shaft,=

segmental gear; a second driven gear, and I a pair of oppositelyrotating pinions respec tively adapted to transmit motion fromo of thedriven gears-to the said vgsegm'e-n'tga f gear; wit-h means forreversing the motion off-the shaft while the pinions are out of meshwith saidsegmental gear.

10; In combination, a reciprocating rack,

a rack driving gear, a shaft carrying sa d gear, a segmental gear keyedon said shaft,

a loose driven gear on said shaft bes'idefthe 5- segmental gear; asecond driven gear, and

a pair of oppositely rotating pinions re- .spectively adapted totransmit motion from oneof the driven gears, to the said segmental gear;with meansfor reversing the motion of the shaftscomprising a segment onthe shaft, and a crank actuated rack bar adapted t to be engaged by the"segment while the pinions are out of mesh withsaid-segmental gear. 711. Means for reciprocating type beds comprising a rack attached to thebed, a

bed driving gear engaging the rack, a shaft carrying said gear, asegmental gear keyed on said shaft, and oppositely rotating pinionsadapted to transmit motion to the segmental gear, said segmental gearbeing pro-.,

vided with a gap to permit the shifting of the pinions without clash;with means for. shifting saidintermediate pinions so as to alternatelydrive the said segmental gear, and meansfor reversing the'bed' while thepinions and segmental gear are out of mesh.

12. In meansfor reciprocating type beds, the combination of. a rackattached to the bed, a bed driving gear engaging the rack, a shaftcarrying saidgear, asegmental gear keyed on said shaft, and oppositelyrotating pinions adapted to transmit motion to the segmental gear, saidsegmental gear .being provided with a gap to permit the shifting of thepinions without clash; with means for shifting said intermediate pinionsso as to alternately drive the said segmental gear; a segment on .theshaft, and a crank actuated rack bar adapted to be engaged by the'se'gment, and reverse 'the'motion of the bed While the pinions are outof mesh with thesegmental gear.

-13. Means for reciprocating I type, beds, comprising a rack attached tothe bed, a bed driving gear engaging the rack, a shaft carrying saidgear, a'segmen'tal gear keyed on sald shaft, a loose drlven gear on saidshaft beside the segmental gear, a second .driven gear meshing with theloose gear;

and oppositely rotating pinions adapted to alternately transmit motionfrom the driven gears to the segmental gear; said segmental gear beingprovided with a gap to permit the shifting of the pinions without clash;with means for shifting said intermediate \pinions so as to alternatelydrive the said segmental gear fromsaid driven gears, and means forreversing the motion of the bed while the pinions are out of mesh withsaid segmental gear.

14c. In combination, a bed driving gear, a

shaft carrying said gear, and a gapped gear keyed to said shaft; with apair. of oppositely rotating driven pinions at one side of said shaft,and means for shifting the pinions alternately into position to meshwith the teeth of the gapped gear while the gap is passing the pinions.

15. In combination, a bed driving gear, a shaft carrying said gear, agapped gear keyed to said shaft, a pain of axially alinedoppositelyrotating driven pinions at one side of said shaft, and means wherebysaid pinions may be alternately shifted into position to mesh with theteeth of the gapped gear while the gap is passing said pinions; withmeans for reversing the rotation of the gapped gear while both pinionsare disengaged therefrom.

16. The combination of a reciprocating type bed having arack on itsunder side, a

bed driving gear meshing with said rack,

andmeans for rotating said gear alternately in opposite directions tomove the bed dur -ing the uniform portions of its strokes, and

means for disengaging the rotating means from said gear at the ends ofsuch uniform I portions of the strokes; with a segment connected withsaid gear, and of substantially the same pitch diameter as the gear, areciprocating rack bar having a Scotch yoke on one end, a crank engagingsaid yoke,

of two witnesses.

' MICHAEL ANDREW DROITCOUR.

Witnesses:

GEO. R. WHATLEY, CHAS, HICKMAn.

